Parks Pocket Doppler Model 841-A, with Speaker and Automatic Shutoff. Comes with 3' Probe. Choose probe style and frequency below. Parks Medical vascular Doppler probes are used for noninvasive assessment of blood flow in peripheral arteries and veins. Different probe frequencies help you evaluate both superficial and deeper vessels in a variety of vascular exams.

Flat probes for pressure studies
Parks flat probes are designed for use with blood pressure cuffs in noninvasive vascular testing, including segmental pressures and ankle‑brachial index measurements. Infant and adult versions are available, generally in the 8–9 MHz range for superficial arterial signals in the arms and legs.

Compatibility
Each Parks probe is designed to operate at a specific frequency or pair of frequencies and must be used with a matching Parks Doppler instrument. Probe styles may be interchanged on compatible systems, but frequency matching is required to maintain performance.